Replace lateinit binding of dependencies with constructor-injection

[geoand]

It is considered good practice in Spring applications to use constructor injection whenever possible (the main reasons are better readability and testability of classes). Moreover, starting with 4.3.RC1 version of Spring, the @Autowired annotation is no longer needed when a class has a single constructor. Leveraging this fact along with Kotlin's very concise constructor syntax yields some nice readability improvements